function switchPanel(id){
    var panel01 = document.getElementById("panel01");
    var panel02 = document.getElementById("panel02");
    
    if(id == "panel01"){
        panel01.style.display = "block";
        panel02.style.display = "none";
    }else{
        panel01.style.display = "none";
        panel02.style.display = "block";
    }
}